First responders confirmed that a man was dead on the tracks in the 4000 block of West Lake Street, Chicago Police Department News Affairs Officer Jose Estrada said, citing preliminary information.

It was not immediately clear if the man had been struck by a train.

Bus shuttles were in place to assist passengers traveling between the Central and California stations because of the incident, Hosinski said. The transit authority was also suggesting that travelers consider using #20 Madison buses in the area as an alternative to the Green Line.

The Chicago Fire Department was called to the scene and has since turned it over to police, said Chief Juan Hernandez, a Chicago Fire Department spokesman.